Battery case sealing inspection apparatus

Abstract

This utility model discloses a battery casing sealing testing device, which includes: a worktable with a testing base mounted on one side of the worktable in a first direction, the testing base having multiple testing holes; a first pressing mechanism disposed on the worktable and arranged on at least one side of the testing base in the circumferential direction, the first pressing mechanism including: a first pressure plate and a first driving member, the first driving member being connected to the first pressure plate and configured to drive the first pressure plate to abut against a flange portion, thereby forming an airtight cavity between the battery casing and the worktable; and a testing device configured to detect the airtightness value in the airtight cavity through the multiple testing holes. According to this utility model, the battery casing sealing testing device ensures tight contact between the opening of the battery casing and the sealing gasket while preventing warping, displacement, or deformation of the periphery of the battery casing, thus guaranteeing the airtightness of the test.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to a battery casing sealing testing device. Background Technology

[0002] Lithium-ion batteries are widely used in new energy vehicles, consumer electronics, and energy storage systems due to their high energy density and long cycle life. In the lithium-ion battery manufacturing process, the battery casing, as a key component of the outer shell structure, not only protects the internal battery cells but also directly affects the battery's sealing performance and airtightness. Accurate testing of its sealing status is crucial for ensuring product quality and operational safety. Currently, a common method for testing the sealing of battery casings is the "inflation-pressurization-depressurization and venting" method. This involves placing the battery casing with its opening facing down on a testing platform, and then mechanically pressing the casing from above to create a sealed cavity between the casing and the testing platform. Air is then introduced into the casing through an air pump and pipes to establish a pressurized environment inside. Pressure sensors monitor changes in the cavity pressure to determine if any leaks exist in the battery casing.

[0003] However, in the existing technology, conventional testing equipment only applies pressure to the bottom of the battery case by an array of distributed pressing heads driven by electric or pneumatic cylinders, ignoring the limiting and pressing control of the opening edge. This makes it very easy for problems such as edge warping, displacement, and deformation of the battery case opening edge to occur during the testing process due to the large pressure from above, ultimately affecting the sealing and bonding effect and causing deviations in the test data. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, this invention provides a battery casing sealing testing device that can ensure airtightness testing and improve the accuracy of airtightness testing.

[0005] According to the present invention, a battery casing sealing testing device includes a battery casing comprising a main body and a flange. The main body has an internal cavity with an opening on one side. The flange is connected to one end of the main body at the opening and extends annularly around the opening. The testing device includes a worktable with a testing base mounted on it. The testing base has multiple testing holes. A first pressing mechanism is disposed on the worktable and arranged on at least one side of the testing base in the circumferential direction. The first pressing mechanism includes a first pressure plate and a first driving member. The first driving member is connected to the first pressure plate and is configured to drive the first pressure plate to move in a first direction and abut against the flange, thereby forming an airtight cavity between the battery casing and the worktable. A testing device is configured to detect the airtightness value in the airtight cavity through the multiple testing holes.

[0006] According to the battery casing sealing testing device of this utility model, by setting a first pressing mechanism, the opening of the battery casing can be made to make close contact with the sealing gasket, while avoiding the edge warping, displacement or deformation of the battery casing, thereby ensuring the airtightness of the test and improving the accuracy of the airtightness test.

[0007] According to some embodiments of the present invention, the first pressing mechanism further includes a second driving member, which is connected to the first pressure plate and is used to drive the first pressure plate to move along a second direction, wherein the first direction is perpendicular to the second direction.

[0008] According to some embodiments of the present invention, the first pressing mechanism further includes: a guide rail extending along a second direction; a first slider, one end of which is slidably fitted within the guide rail, and the other end of which is connected to the first pressure plate; a second driving member connected to the first slider for driving the first slider to move along the second direction; and a first guide rod extending along the second direction and fixedly connected to the guide rail, wherein the first slider is movably sleeved on the first guide rod.

[0009] According to some embodiments of the present invention, the first pressing mechanism further includes: a first mounting base, which is arranged on the side of the guide rail away from the detection base in the third direction and is fixedly connected to the worktable; a first sliding member, one end of which is connected to the guide rail, one of which is provided with a second slider and the other with a first sliding groove, the first sliding groove extending along the third direction, the second slider being slidably engaged in the first sliding groove; and a third driving member, which is fixed on the first mounting base and connected to the first sliding member, for driving the first sliding member to move along the third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0010] According to some embodiments of the present invention, the first pressing mechanism further includes: a second mounting base arranged at a distance from the first mounting base in the second direction; a second sliding member, one end of which is connected to the guide rail, a third slider on one of the second sliding member and the second mounting base, and a second sliding groove on the other, the second sliding groove extending along the third direction, the third slider being slidably fitted within the second sliding groove; a second guide rod extending along the third direction and fixedly connected to the second sliding member, the second mounting base also having a through hole extending through the second mounting base along the third direction, the second guide rod being movably fitted within the through hole.

[0011] According to some embodiments of the present invention, the number of the first pressing mechanisms is multiple, and the multiple first pressing mechanisms are arranged at intervals along the circumference of the detection base; and / or, the number of the first pressure plate and the number of the first driving member are both multiple, the multiple first pressure plates are arranged at intervals along the second direction, and the multiple first driving members correspond one-to-one with the multiple first pressure plates.

[0012] According to some embodiments of the present invention, the testing device further includes: a second pressing mechanism, which is disposed on the worktable. The second pressing mechanism includes: a second pressure plate and a drive assembly. In the first direction, the second pressure plate is arranged on the side of the testing base away from the worktable. The drive assembly is connected to the second pressure plate and is used to drive the second pressure plate to abut against the main body.

[0013] According to some embodiments of the present invention, the drive assembly includes: a fourth drive member connected to the second pressure plate for driving the second pressure plate to move along the first direction; the second pressing mechanism further includes: a first mounting plate arranged on the side of the second pressure plate away from the detection base in the first direction, the fourth drive member being fixed to the first mounting plate; a support frame, one end of which is connected to the worktable, and the other end extending along the first direction toward the end away from the detection base and fixed to the first mounting plate; a second mounting plate spaced apart from the first mounting plate along the first direction and arranged on the side of the first mounting plate away from the first pressure plate, the second mounting plate being connected to the first mounting plate to define an installation space, the fourth drive member being arranged within the installation space; the drive assembly further includes: a fifth drive member fixed to the other end of the support frame and connected to the second mounting plate for driving the second mounting plate to move along the first direction.

[0014] According to some embodiments of this utility model, the plurality of detection holes include: an air inlet, a pressure relief hole, and a pressure detection hole. The detection device includes: an air inlet pipe and an air pump, one end of the air inlet pipe being connected to the air inlet and the other end being connected to the air pump; a pressure relief pipe, one end of which is connected to the pressure relief hole and the other end being connected to the external space; a pressure sensor, which is connected to the pressure detection hole and is used to detect the internal air pressure of the battery casing; a first control valve and a second control valve, the first control valve being connected in series on the air inlet pipe and the second control valve being connected in series on the pressure relief pipe.

[0015] According to some embodiments of the present invention, the detection device further includes a silencer, which is connected to the other end of the pressure relief pipeline.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the detection equipment according to an embodiment of the present utility model; Figure 2 This is a schematic diagram showing the arrangement of the testing equipment and the battery casing according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the first pressing mechanism according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the first pressing mechanism according to an embodiment of the present utility model from another angle; Figure 5 This is a partial schematic diagram of the second pressing mechanism according to an embodiment of the present utility model.

[0018] Figure label: 100. Testing equipment; 10. Workbench; 11. Inspection base; 12. Inspection hole; 20. First pressing mechanism; 21. First pressure plate; 22. First driving component; 231. Guide rail; 232. First slider; 233. First guide rod; 241. First mounting base; 2411. Second slider; 242. First sliding member; 243. Third driving component; 251. Second mounting base; 2511. Third slider; 252. Second sliding member; 253. Second guide rod; 30. Detection device; 31. Air intake pipe; 32. Air pump; 33. Pressure relief pipe; 34. Pressure sensor; 35. First control valve; 36. Second control valve; 40. Second pressing mechanism; 41. Second pressure plate; 42. First mounting plate; 43. Support frame; 44. Second mounting plate; 45. Drive assembly; 451. Fourth drive component; 452. Fifth drive component; 50. Silencer; 200. Battery casing; 201. Main body; 202. Flange; Z, first direction; X, second direction; Y, third direction. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] The following is for reference. Figures 1-5 This invention describes a battery casing sealing testing device 100 according to an embodiment of the present invention.

[0021] According to an embodiment of the present invention, a battery casing sealing testing device 100 is provided, wherein, with reference to... Figure 2 The battery housing 200 includes a main body 201 and a flange 202. The main body 201 has a receiving cavity with an opening on one side. The flange 202 is connected to one end of the main body 201 at the opening and extends around the opening in an annular shape.

[0022] like Figures 1-2As shown, the testing device 100 includes: a workbench 10, a first pressing mechanism 20, and a testing device 30. A testing base 11 is mounted on the workbench 10, and the testing base 11 is provided with a plurality of testing holes 12. The first pressing mechanism 20 is disposed on the workbench 10 and arranged on at least one side of the testing base 11 in the circumferential direction. The first pressing mechanism 20 includes: a first pressure plate 21 and a first driving member 22. The first driving member 22 is connected to the first pressure plate 21 and is configured to drive the first pressure plate 21 to move along the first direction Z and abut against the flange portion 202, so that an airtight cavity is formed between the battery casing 200 and the workbench 10. The testing device 30 is configured to detect the airtightness value in the airtight cavity through the plurality of testing holes 12.

[0023] The workbench 10 is mainly used to place the battery casing 200 to be tested; the first pressing mechanism 20 is mainly used to press the battery casing 200 so that the battery casing 200 is in close contact with the workbench 10, thereby forming an airtight cavity between the battery casing 200 and the workbench 10; the detection device 30 is mainly used to detect the airtightness value in the airtight cavity so as to realize the airtightness detection of the battery casing 200.

[0024] Specifically, when it is necessary to test the airtightness of the battery casing 200, the battery casing 200 is generally placed upside down on the workbench 10. At this time, the opening of the battery casing 200 faces the workbench 10, and the test base 11 is arranged in the receiving cavity, that is, multiple test holes 12 are arranged in the receiving cavity. Then, the first driving member 22 drives the first pressure plate 21 to press the flange portion 202 of the battery casing 200 so that the battery casing 200 and the workbench 10 are sealed, and an airtight cavity is formed between the battery casing 200 and the workbench 10. Then, the test device 30 is activated so that the test device 30 detects the airtightness value in the airtight cavity through the multiple test holes 12.

[0025] The phrase "the first driving member 22 is configured to drive the first pressure plate 21 to abut against the flange portion 202, so that an airtight cavity is formed between the battery housing 200 and the worktable 10" can be understood as the first pressing mechanism 20 applying pressure to the periphery of the battery housing 200 to ensure that the opening of the battery housing 200 is in close contact with the worktable 10, thereby forming an airtight cavity between the battery housing 200 and the worktable 10. In other words, the first pressing mechanism 20 ensures that the opening of the battery housing 200 is in close contact with the sealing gasket while preventing warping, displacement, or deformation of the periphery of the battery housing 200, thus guaranteeing airtightness testing and improving the accuracy of airtightness testing.

[0026] Optionally, a sealing gasket is also included. The sealing gasket is arranged on the worktable 10 and is formed in a ring around the circumference of the test base 11. This can further improve the sealing between the battery housing 200 and the worktable 10, thereby improving the test accuracy of the test equipment 100.

[0027] According to the battery casing sealing test device 100 of this utility model, by setting the first pressing mechanism 20, the opening position of the battery casing 200 can be in close contact with the sealing gasket, while avoiding the edge warping, displacement or deformation of the periphery of the battery casing 200, thereby ensuring the airtightness test and improving the accuracy of the airtightness test.

[0028] According to some embodiments of the present invention, the first pressing mechanism 20 further includes a second driving member connected to the first pressure plate 21, used to drive the first pressure plate 21 to move along a second direction X, wherein the first direction Z is perpendicular to the second direction X. For example, the second direction X is the length or width direction of the battery casing 200. Thus, the second driving member drives the first pressure plate 21 to move along the second direction X, enabling the first pressing mechanism 20 to adapt to battery casings 200 of different sizes, thereby improving the adaptability of the testing device 100.

[0029] It should be noted that the second driving component can be a motor or a manually adjustable handheld component; there are no restrictions here.

[0030] According to some embodiments of this utility model, such as Figure 3 As shown, the first pressing mechanism 20 further includes: a guide rail 231 extending along the second direction X; a first slider 232, one end of which is slidably fitted within the guide rail 231, and the other end of which is connected to the second pressure plate 41; a second driving member connected to the first slider 232 for driving the first slider 232 to move along the second direction X; and a first guide rod 233 extending along the second direction X and fixedly connected to the guide rail 231, with the first slider 232 movably mounted on the first guide rod 233. This design limits the movement trajectory of the first pressure plate 21, ensuring that the first pressure plate 21 can only move along the second direction X without deviation, thereby improving the stability of the first pressure plate 21's movement.

[0031] Optionally, the second driving component is a handheld component. The first pressing mechanism 20 further includes: bolts, a plurality of first bolt holes formed on the first guide rod 233, and a second bolt hole formed on the second slider 2411. The second slider 2411 and the first guide rod 233 are fastened together by bolts passing through the second bolt holes and the first bolt holes. In this way, the position of the second slider 2411 can be limited, so that the second slider 2411 is relatively fixed, thereby ensuring that the second pressure plate 41 will not shift during the process of the first pressing mechanism 20 pressing the battery housing 200, thus ensuring the sealing between the battery housing 200 and the worktable 10.

[0032] According to some embodiments of this utility model, such as Figure 3 As shown, the first pressing mechanism 20 further includes: a first mounting base 241, a first sliding member 242, and a third driving member 243. In the third direction Y, the first mounting base 241 is arranged on the side of the guide rail 231 away from the detection base 11 and is fixedly connected to the worktable 10; one end of the first sliding member 242 is connected to the guide rail 231, one of the first sliding member 242 and the first mounting base 241 is provided with a second slider 2411, and the other is provided with a first sliding groove. The first sliding groove extends along the third direction Y, and the second slider 2411 is slidably fitted in the first sliding groove; the third driving member 243 is fixed on the first mounting base 241 and connected to the first sliding member 242, and is used to drive the first sliding member 242 to move along the third direction Y, wherein the first direction Z, the second direction X, and the third direction Y are perpendicular to each other. Specifically, the third driving member 243 can drive the guide rail 231 to move along the third direction Y, which in turn can drive the first pressure plate 21 to move along the third direction Y. Thus, it can be understood that the first pressure plate 21 in this embodiment can not only be adjusted in the first direction Z, but also in the second direction X and the third direction Y, thereby improving the adaptability of the first pressure plate 21. This allows the first pressure plate 21 to adjust its position according to the size of the battery casing 200, thereby achieving a pressing and sealing of the battery casing 200, which can improve the adaptability of the testing device 100. At the same time, the fact that the first pressure plate 21 can be adjusted in the third direction Y also facilitates the placement and removal of the battery device.

[0033] In addition, the arrangement of the first mounting base 241 and the first sliding member 242 can limit the movement trajectory of the first pressure plate 21, thereby improving the stability of the movement of the first pressure plate 21 in the third direction Y.

[0034] The phrase "one of the first sliding member 242 and the first mounting base 241 is provided with a second slider 2411 and the other is provided with a first groove" is intended to indicate that when the first sliding member 242 is provided with a second slider 2411, the first mounting base 241 is formed with a first groove; when the first sliding member 242 is formed with a first groove, the first mounting base 241 is formed with a second slider 2411.

[0035] According to some embodiments of this utility model, such as Figure 3 As shown, the first pressing mechanism 20 further includes: a second mounting base 251, a second sliding member 252, and a second guide rod 253, which are arranged at a distance from the first mounting base 241 in the second direction X. One end of the second sliding member 252 is connected to the guide rail 231. One of the second sliding member 252 and the second mounting base 251 is provided with a third slider 2511, and the other is provided with a second sliding groove. The second sliding groove extends along the third direction Y, and the third slider 2511 is slidably fitted in the second sliding groove. The second guide rod 253 extends along the third direction Y and is fixedly connected to the second sliding member 252. The second mounting base 251 also has a through hole extending through the second mounting base 251 along the third direction Y, and the second guide rod 253 is movably fitted in the through hole. The arrangement of the second mounting base 251, the second sliding member 252, and the second guide rod 253 can further limit the movement of the guide rail 231 in the third direction Y, thereby further improving the stability of the first pressure plate 21 in the third direction Y.

[0036] The phrase "one of the second slider 252 and the second mounting base 251 is provided with a third slider 2511 and the other is provided with a second groove" is intended to indicate that when the second slider 252 is provided with a third slider 2511, the second mounting base 251 is formed with a second groove; when the second slider 252 is formed with a second groove, the second mounting base 251 is formed with a third slider 2511.

[0037] Optionally, the third driving component 243 is a lead screw motor, wherein the motor is fixed on the first mounting base 241, and the lead screw is connected to the first sliding member 242 for transmission, so as to drive the first sliding member 242 to reciprocate along the third direction Y.

[0038] According to some embodiments of this utility model, such as Figures 1-2 As shown, there are multiple first pressing mechanisms 20, which are arranged at intervals along the circumference of the detection base 11. In this way, a pressing seal can be achieved on the entire circumference of the battery housing 200, thereby improving the sealing performance between the battery housing 200 and the worktable 10.

[0039] For example Figure 1 As shown, there are four first pressing mechanisms 20, which are respectively arranged on the left and right sides and the front and rear sides of the detection base 11.

[0040] According to some embodiments of this utility model, such as Figure 3As shown, there are multiple first pressure plates 21 and multiple first driving members 22. The multiple first pressure plates 21 are arranged at intervals along the second direction X, and the multiple first driving members 22 correspond one-to-one with the multiple first pressure plates 21. In this way, the testing device 100 can test battery casings 200 of different sizes. The number of first driving members 22 can be selected according to the size of the battery casing 200, thereby improving the adaptability of the testing device 100 and reducing the energy consumption of the entire testing device 100.

[0041] According to some embodiments of this utility model, such as Figure 1 As shown, the testing device 100 further includes a second pressing mechanism 40, which is disposed on the worktable 10. The second pressing mechanism 40 includes a second pressure plate 41 and a drive assembly 45. In the first direction Z, the second pressure plate 41 is arranged on the side of the testing base 11 away from the worktable 10. The drive assembly 45 is connected to the second pressure plate 41 and is used to drive the second pressure plate 41 to abut against the main body 201. The second pressing mechanism 40 mainly presses the main body 201 of the battery housing 200 from above. The main body 201 has a relatively large area. Therefore, by setting the second pressing mechanism 40, the uniformity of the force on the battery housing 200 and the sealing between the battery housing 200 and the worktable 10 can be further improved, thereby improving the accuracy of the airtightness test of the battery housing 200.

[0042] According to some embodiments of this utility model, such as Figure 1 As shown, the drive assembly 45 includes a fourth drive member 451, which is connected to the second pressure plate 41 and is used to drive the second pressure plate 41 to move along the first direction Z. The second pressing mechanism 40 also includes a first mounting plate 42, a second mounting plate 44, and a support frame 43. In the first direction Z, the first mounting plate 42 is arranged on the side of the second pressure plate 41 away from the detection base 11, and the fourth drive member 451 is fixed on the first mounting plate 42. One end of the support frame 43 is connected to the worktable 10, and the other end is directed away from the detection base 11 along the first direction Z. One end extends and is fixed to the first mounting plate 42; the second mounting plate 44 is arranged at intervals with the first mounting plate 42 along the first direction Z and is arranged on the side of the first mounting plate 42 away from the first pressure plate 21. The second mounting plate 44 is connected to the first mounting plate 42 to define the installation space. The fourth driving member 451 is arranged in the installation space. The driving assembly 45 also includes: a fifth driving member 452, which is fixed to the other end of the support frame 43 and is connected to the second mounting plate 44 for driving the second mounting plate 44 to move along the first direction Z.

[0043] Specifically, when it is necessary to test the battery housing 200, the fifth drive member 452 can be activated first. The fifth drive member 452 drives the second mounting plate 44 to move downward, and at the same time drives the first mounting plate 42 and the fourth drive member 451 to move downward. Then the fourth drive member 451 is activated to make the second pressure plate 41 move downward, thereby pressing the main body 201 of the battery housing 200 so that the battery housing 200 is sealed with the worktable 10.

[0044] Therefore, it can be understood that in this embodiment, two driving components can be used to achieve layered control of the downward movement of the second pressure plate 41. For example, the fifth driving component 452 can achieve rapid descent of the second pressure plate 41, and stop working when it descends to a certain position. At this time, the fourth driving component 451 is activated to make the second pressure plate 41 descend slowly until the second pressure plate 41 contacts the battery housing 200, and then continuous pressure is applied to achieve a seal between the battery housing 200 and the worktable 10. This can improve the detection rate of the entire detection device 30. In addition, two driving components can be used to apply pressure to the battery housing 200, which can further improve the sealing between the battery housing 200 and the worktable 10, thereby improving the accuracy of the detection.

[0045] For example Figure 1 As shown, the support frame 43 is formed as an L-shaped bracket. One end of the support frame 43 is connected to the circumferential side of the worktable 10, and the other end extends upward and inward to the middle of the second mounting plate 44 and is connected to the fifth driving member 452. The fifth driving member 452 is a cylinder. The fifth driving member 452 is connected to the second mounting plate 44 through a piston rod to drive the second mounting plate 44 to move up and down. At the same time, since the first mounting plate 42 and the second mounting plate 44 are fixedly connected, the fifth driving member 452 can synchronously drive the first mounting plate 42 to move up and down. The fourth driving member 451 is also a cylinder. The first mounting plate 42 has a mounting hole that runs through the first mounting plate 42 in the vertical direction. The piston rod of the fourth driving member 451 passes through the mounting hole and is connected to the second pressure plate 41 to drive the second pressure plate 41 to move up and down.

[0046] Optional, for example Figure 1 and Figure 5 As shown, there are multiple second pressure plates 41 and multiple fourth driving components 451. The multiple second pressure plates 41 and multiple fourth driving components 451 correspond one-to-one. The fourth driving components 451 are arranged in a matrix on the first mounting plate 42. In this way, the uniformity of pressure applied by the second pressure plates 41 to the battery casing 200 can be further improved, thereby improving the accuracy of detection.

[0047] According to some embodiments of this utility model, such as Figure 2As shown, the multiple detection holes 12 include: an air inlet 121, a pressure relief hole 122, and a pressure detection hole 123. The detection device 30 includes: an air inlet pipe 31, an air pump 32, a pressure relief pipe 33, a pressure sensor 34, a first control valve 35, and a second control valve 36. One end of the air inlet pipe 31 is connected to the air inlet 121, and the other end is connected to the air pump 32. One end of the pressure relief pipe 33 is connected to the pressure relief hole 122, and the other end is connected to the external space. The pressure sensor 34 is connected to the pressure detection hole 123 and is used to detect the internal air pressure of the battery casing 200. The first control valve 35 is connected in series with the air inlet pipe 31 and is used to control the opening and closing of the air inlet pipe 31. The second control valve 36 is connected in series with the pressure relief pipe 33 and is used to control the opening and closing of the pressure relief pipe 33.

[0048] The air pump 32 supplies air to the airtight cavity through the air inlet 121, and the first control valve 35 controls the opening and closing of the air inlet pipe 31. Specifically, when performing an airtightness test on the battery casing 200, the first control valve 35 is opened first, and then the air pump 32 is turned on. At this time, gas can enter the airtight cavity through the air inlet pipe 31 and the air inlet 121, thereby pressurizing the airtight cavity.

[0049] The pressure relief pipe is used to discharge the gas in the airtight cavity after the test is completed, thereby releasing the pressure in the airtight cavity, so that the battery housing 200 can be removed from the workbench 10 and then the housing to be tested can be replaced.

[0050] The second control valve 36 is used to control the opening and closing of the pressure relief pipe. When the battery housing 200 is subjected to airtightness testing and inflation, the second control valve 36 disconnects the passage of the pressure relief pipe to ensure the airtightness of the airtight cavity. After the test is completed, the second control valve 36 opens the passage of the pressure relief pipe to allow the gas to be discharged, thereby releasing the pressure in the airtight cavity, so that the battery housing 200 can be removed from the workbench 10 and the housing to be tested can be replaced.

[0051] Pressure sensor 34 is used to detect pressure changes inside the airtight cavity in real time.

[0052] Optionally, the detection device 100 also includes a control device, wherein the first control valve 35, the second control valve 36 and the pressure sensor 34 are all electrically connected to the control device, thereby improving the automation level of the detection device 100.

[0053] According to some embodiments of this utility model, such as Figure 2 As shown, the testing device 100 also includes a silencer 50, which is connected to the other end of the pressure relief pipeline 33. This reduces the noise generated during the pressure relief process, thereby improving the comfort of the testing process.

[0054] Specifically, when performing an airtightness test on the battery casing 200, the first control valve 35 is first opened. At this time, the air pump 32 can vent air into the airtight cavity, thereby pressurizing the airtight cavity formed between the battery casing 200 and the worktable 10. At the same time, the pressure sensor 34 monitors the internal pressure change in real time through the pressure detection hole 123. After the test is completed, the air pump 32 and the first control valve 35 are turned off, and the second control valve 36 is opened. At this time, the gas in the cavity releases the pressure in the cavity to the outside through the pressure relief hole 122, the second control valve 36, the pressure relief pipe 33, and the silencer 50.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery case sealing inspection apparatus, the battery case (200) comprising: The device comprises a main body (201) and a flange (202), wherein the main body (201) has a receiving cavity with an opening on one side, and the flange (202) is connected to the main body (201) at one end of the opening and extends annularly around the opening. The detection device (100) is characterized by comprising: A workbench (10) is provided with a detection base (11) and a plurality of detection holes (12) are provided on the detection base (11); A first pressing mechanism (20) is disposed on the workbench (10) and arranged on at least one side of the detection base (11) in the circumferential direction. The first pressing mechanism (20) includes a first pressure plate (21) and a first driving member (22). The first driving member (22) is connected to the first pressure plate (21). The first driving member (22) is configured to drive the first pressure plate (21) to move along a first direction (Z) and abut against the flange (202) so that an airtight cavity is formed between the battery housing (200) and the workbench (10). A detection device (30) is configured to detect the air tightness value in the airtight cavity through a plurality of the detection holes (12).

2. The battery case seal detection apparatus according to claim 1, characterized by, The first pressing mechanism (20) further includes a second driving member, which is connected to the first pressure plate (21) and is used to drive the first pressure plate (21) to move along a second direction (X), wherein the first direction (Z) is perpendicular to the second direction (X).

3. The battery case seal detection apparatus according to claim 2, characterized by, The first pressing mechanism (20) further includes: A guide rail (231) extends along a second direction (X); The first slider (232) has one end slidably fitted into the guide rail (231), and the other end of the first slider (232) is connected to the first pressure plate (21). The second driving member is connected to the first slider (232) and is used to drive the first slider (232) to move along the second direction (X); The first guide rod (233) extends along the second direction (X) and is fixedly connected to the guide rail (231), and the first slider (232) is movably sleeved on the first guide rod (233).

4. The battery case seal detection apparatus according to claim 3, characterized by, The first pressing mechanism (20) further includes: The first mounting base (241) is arranged on the side of the guide rail (231) away from the detection base (11) in the third direction (Y) and is fixedly connected to the worktable (10); A first sliding member (242) is connected at one end to the guide rail (231). One of the first sliding member (242) and the first mounting base (241) is provided with a second slider (2411), and the other is provided with a first sliding groove. The first sliding groove extends along the third direction (Y), and the second slider (2411) is slidably engaged in the first sliding groove. A third driving member (243) is fixed on the first mounting base (241) and connected to the first sliding member (242), for driving the first sliding member (242) to move along the third direction (Y), wherein the first direction (Z), the second direction (X) and the third direction (Y) are perpendicular to each other.

5. The battery case seal detection apparatus according to claim 4, characterized by, The first pressing mechanism (20) further includes: A second mounting base (251) is arranged at a distance from the first mounting base (241) in the second direction (X); The second slider (252) has one end connected to the guide rail (231). One of the second slider (252) and the second mounting base (251) is provided with a third slider (2511), and the other is provided with a second groove. The second groove extends along the third direction (Y), and the third slider (2511) is slidably engaged in the second groove. The second guide rod (253) extends along the third direction (Y) and is fixedly connected to the second sliding member (252). The second mounting base (251) also has a through hole that extends through the second mounting base (251) along the third direction (Y). The second guide rod (253) is movably fitted into the through hole.

6. The battery case seal detection apparatus according to any one of claims 1 to 5, characterized by, The number of the first pressing mechanism (20) is multiple, and the multiple first pressing mechanisms (20) are arranged at circumferential intervals along the detection base (11); and / or, There are multiple first pressure plates (21) and multiple first driving members (22). The multiple first pressure plates (21) are arranged at intervals along the second direction (X). The multiple first driving members (22) correspond one-to-one with the multiple first pressure plates (21).

7. The battery case seal detection apparatus according to claim 1, characterized by, Also includes: The second pressing mechanism (40) is disposed on the worktable (10). The second pressing mechanism (40) includes a second pressing plate (41) and a drive assembly (45). In the first direction (Z), the second pressing plate (41) is arranged on the side of the detection base (11) away from the worktable (10). The drive assembly (45) is connected to the second pressing plate (41) and is used to drive the second pressing plate (41) to abut against the main body (201).

8. The battery case seal detection apparatus according to claim 7, characterized by, The drive assembly (45) includes a fourth drive member (451), which is connected to the second pressure plate (41) and is used to drive the second pressure plate (41) to move along the first direction (Z). The second pressing mechanism (40) further includes: The first mounting plate (42) is arranged on the side of the second pressure plate (41) away from the detection base (11) in the first direction (Z), and the fourth driving member (451) is fixed on the first mounting plate (42). A support frame (43) is provided, one end of which is connected to the workbench (10), and the other end extends along the first direction (Z) toward the end away from the detection base (11) and is fixed to the first mounting plate (42). The second mounting plate (44) is arranged at intervals from the first mounting plate (42) along the first direction (Z) and is located on the side of the first mounting plate (42) away from the first pressure plate (21). The second mounting plate (44) is connected to the first mounting plate (42) to define an installation space. The fourth driving member (451) is arranged within the installation space. The drive assembly (45) further includes a fifth drive member (452), which is fixed to the other end of the support frame (43) and connected to the second mounting plate (44) for driving the second mounting plate (44) to move along the first direction (Z).

9. The battery case seal detection apparatus according to claim 1, characterized by, The plurality of detection holes (12) include: an air inlet (121), a pressure relief hole (122), and a pressure detection hole (123). The detection device (30) includes: An air intake pipe (31) and an air pump (32) are provided, one end of which is connected to the air intake port (121) and the other end of which is connected to the air pump (32). A pressure relief pipeline (33) is provided, one end of which is connected to the pressure relief hole (122), and the other end is connected to the external space. Pressure sensor (34), which is connected to the pressure detection hole (123), is used to detect the air pressure inside the battery casing (200); A first control valve (35) and a second control valve (36) are connected in series on the intake pipe (31) and the second control valve (36) is connected in series on the pressure relief pipe (33).

10. The battery case seal detection apparatus according to claim 9, characterized by, Also includes: A silencer (50) is connected to the other end of the pressure relief line (33).

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